"On their return down the river, Japazaws, chief of Potomac, having furnished them with guides to conduct them up the River Quiyough, at the mouth of which he lived, (supposed by Stith[57:A] to be Potomac Creek,) in quest of Matchqueon, a mine, which they had heard of, the party left the Indian hostages in the barge, secured by a small chain, which they were to have for their reward. The mine turned out to be worthless, containing only a sort of antimony, used by the natives to paint themselves..."